Dust-guard.



l. SCZHVHWROOST.

DUST GUARD.

APPLICATION FILED JUNE 16, 1913.

Mb? Patented July @1915.

l JAKOB SCHMID-ROOST, F OERLIKON, SWITZERLAND.

DUST-GUARD.

To all whom it may concern:

Be it known that I, JAKoB So Mm-Roos'r,

\. a citizen of the Republic of Switzerland, re-

following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which 1t appertains. tomake and use the same, reference being had to the accompanying drawing,

hit

tit

and to letters or figures of reference marked thereon, which form apartof this specification."

Packing-means for vehicles consisting of two covering bushes projectingone into the other an of which the one is fixed to the shaft and theother is stationary, are already known. The covering-bushes form a slotat the point where mud andwater enter into the bearing. For the purposeof preventing the mud and water from entering into bearings of this kindprovided on tramwaycars there is provided according to this inventionaradial rib on the moving bush, said rib acting as a thrower-member andclosing the side-entrance of the bearing, so that the mud and waterwhich otherwise would enter between the two bushes are thrown away fromthe shaft.

According to this invention there can be provided on the stationarycovering bush a second rib, which forms together, with the thrower-riban annular slot' narrowing toward the shaft and which conveys the mud orthe water getting into the side entrance of the bearing to the throwermember.

A construction according to this invention is shown in section by way ofexample on the accompanying drawing.

1 denotes a shaft of a tramway-car; 2 is a bearing for this shaft and 3the casing of the bearing.

ing-bush 7 is mounted on the shaft 1, while The part 4 of the outercoverthe inner covering-bush 5 is connected to. the casing 3. The innercovering-bush projects into the outer covering-bush 4, 7 Bothcovering-bushes are surrounded by a rim 11 of the casing 3. Between thebush 5 and the part 4 of the outer bush 7 there is provided the annularentrance slot 14. A stationary, radial rib 12 provided on the bush 5 anddirected toward the shaft 1 contracts this entrance-slot 14: The lowerpart of this rib. 12 is provided with a slot 6. In front of the entranceslot 14 there is provided on the Specification of Letters Patent.

' Application filed June 16, 1913. Serial No. 774,027.

part 4' a radial tapering rib 10, which acts as a thrower member andforms together with the part 8 of the bush 7 a groove 9. Said rib 10covers also the entrance slot 14 and forms together with the rib 12 anannular slot 13 getting narrower toward the shaft 1.

The new and main feature of this invention consists in the provisionof'the throwerrib 10 in front of the entrance-slot 14 and in theprovision of the rib'l2, forming together with the rib 10 the annularslot 13. Owing to the'arrangement of throwing-rib 10 the mud or watergetting near the entrance-slot 14 is thrown outward in the direction ofthe arrow shown in the drawing. Owing to the provision of the rib 12 andof the annular slot 13 getting narrower toward the shaft the mudor wateralready conveyed to the 75 entrance slot 14 is brought into contact withthe rib 10, i. c. it is fed toward this rib for the purpose of beingthrown outward. The material thrown against the inner wall of the part 7is forced, in a known manner, by

.the centrifugal force out of this covering bush; When the shaft 1 isstationary, the material flows in the upper part of the bush along theinner wall of the part 7 into the groove 9, flowing then out of thisgroove 9 in the lower part of the bush, so that it is also preventedfrom entering into the slot 14. If, however, mud enters through saidslot 14,

it is fed by the conical part 15 adjacent to the axle bearing, an innerbushing mounted on the latter having a flange extending into saidchannel, and forming an annular slot between it and the inner wall ofthe channel,

and a radial rib on said inner-wall in front of the annular slot.

2.- A dust guard for vehicles comprising an outer bushing, mounted onthe vehicle axle, consisting of a member having an annular channel whosewalls diverge toward the axle bearing, an inner bushing on the lat ter,having an inclined flange extending into the channel, said flange havinga rib on its free end perpendicular to the axis of the bearing, and aradial rib on the inner wall of the channel in front of an annular slotformed between said inner wall and one end ofthe perpendicular rib, saidribs forming between them a radial slot communicating with the annularslot.

3. A dust guard for vehicles, comprising an outer bushing mounted on thevehicle axle consisting of a member having an annular channel whoseWalls diverge toward the, axle bearing, an inner bushing on the latterhaving an inclined flange projecting axle consisting of a member havingan an-' nular channel whose walls diverge-toward the axle bearing, aninner bushing on the latter having an inclined flange projecting fromthe inner portion of the bearing into said channel, a rib on the freeend of the flange perpendicular to the axis of the bearing and forminginner and outer annular slots between its ends and the walls of saidchannel, a radial rib on the inner wall of the channel in front of theperpendicular rib and forming with the latter a radial inwardlyconverging slot communicating-at its inner end with the inner annularslot.

5. A dust guard for "ehicles, comprising an outer bushing mounted onthe' vehicle axle consisting of a member having an annular channel whosewalls diverge toward the axle bearing, an internal rib on the end of theinner wall ofthe channel, an inner bushing on the bearing having aninclined flange projecting over said rib and diverging from the innerwall of the channel, a rib on the free end of the flange perpendicularto the axis of the bearing and forming inner and outer annular slotsbetween its ends and the walls of the channel, a radial rib on the rnnerwall of the channel in front of the perpendicular rib and extendingsubstantially half way across the channel, said radial and perpendicularribs forming, a radial slot communicating withthe annular slots.

6. A dust guard for vehicles, comprising an. outer bushing mounted onthe vehicle axle consisting of'a member having an annular channel whosewalls diverge toward the axle bearing, an internal rib on the end of theinner wall of the channel, an inner bushing on the bearing having aninclined flange, projecting over said rib and diverging from the innerwall of the channel,-a rib on the free end of the flange perpendicularto the axis of the bearing and forming inner and outer annular slotsbetween its ends and the walls of the channel, a radial rib on the innerWall of the channel in front of the perpendicular rib and extendingsubstantially half way across the channel, said radial and perpendicularribs forming a radial slotcommunicating with the annular slots, and 'aflange onthe bearing concentric to the axis thereof surrounding thechannel.

In testimony that I claim the foregoing as 'my invention, I have signedmy name in presence of two subscribing witnesses.

JAKOB SCHMID-ROOST.

Witnesses: A'RNOLD LEHNER, CARL GUBLER.

